TimeFlies

Use Time Flies to keep track of all of your shopping, errands, bills, to-do lists, and more. You can assign due dates to tasks, and Time Flies will remind you when it's time to complete them. For an especially time-sensitive task, use the procrastination alarm and Time Flies will make sure you finish it!
Features
* Lightweight and low on system resources
* Create tasks as simply or as detailed as you want
* Create color-coded categories to group tasks into separate lists
* Let Time Flies automatically sort your task list, or define your own custom sorting parameters
* Assign due dates, due date repetition, and procrastination alarms to tasks